const toString = Object.prototype.toString;

/**
 * @description: 判断值是否未某个类型
 */
export function is(val: unknown, type: string) {
  return toString.call(val) === `[object ${type}]`;
}

/**
 * @description:  是否为函数
 */
export function isFunction(val: unknown): val is (...args: any[]) => any {
  return is(val, "Function") || is(val, "AsyncFunction");
}

/**
 * @description: 是否已定义
 */
export const isDef = <T = unknown>(val?: T): val is T => typeof val !== "undefined";

export const isUnDef = <T = unknown>(val?: T): val is T => !isDef(val);
/**
 * @description: 是否为对象
 */
export const isObject = (val: any): val is Record<any, any> => val !== null && is(val, "Object");

/**
 * @description:  是否为时间
 */
export function isDate(val: unknown): val is Date {
  return is(val, "Date");
}

/**
 * @description:  是否为数值
 */
export function isNumber(val: unknown): val is number {
  return is(val, "Number");
}

/**
 * @description:  是否为AsyncFunction
 */
export function isAsyncFunction<T = any>(val: unknown): val is () => Promise<T> {
  return is(val, "AsyncFunction");
}

/**
 * @description:  是否为promise
 */
export function isPromise<T = any>(val: unknown): val is Promise<T> {
  return is(val, "Promise") && isObject(val) && isFunction(val.then) && isFunction(val.catch);
}

/**
 * @description:  是否为字符串
 */
export function isString(val: unknown): val is string {
  return is(val, "String");
}

/**
 * @description:  是否为boolean类型
 */
export function isBoolean(val: unknown): val is boolean {
  return is(val, "Boolean");
}

/**
 * @description:  是否为数组
 */
export function isArray(val: any): val is Array<any> {
  return val && Array.isArray(val);
}

/**
 * @description: 是否客户端
 */
export const isClient = () => typeof window !== "undefined";

/**
 * @description: 是否为浏览器
 */
export const isWindow = (val: any): val is Window =>
  typeof window !== "undefined" && is(val, "Window");

export const isElement = (val: unknown): val is Element => isObject(val) && !!val.tagName;

export const isServer = typeof window === "undefined";

// 是否为图片节点
export function isImageDom(o: Element) {
  return o && ["IMAGE", "IMG"].includes(o.tagName);
}

export function isNull(val: unknown): val is null {
  return val === null;
}

export function isNullAndUnDef(val: unknown): val is null | undefined {
  return isUnDef(val) && isNull(val);
}

export function isNullOrUnDef(val: unknown): val is null | undefined {
  return isUnDef(val) || isNull(val);
}

// HTTP URL检测函数
export const isHttpUrl = (path?: string): boolean => (path ? /^https?:\/\//.test(path) : false);
